Assembly device

Abstract

The present invention discloses an assembly device for mounting a protective cover including a buckle on a workpiece, comprising: a frame; a supporting plate connected to the frame for supporting the workpiece; a movable bracket floatingly connected to the frame and including an abutment portion; a cover plate detachably connected to the movable bracket for securing the protective cover; a buckle-opening assembly including a vertical movable block and a horizontal movable block abutting against an inclined surface of the vertical movable block; a rotating shaft rotatably connected to the frame, a first cam, and a second cam, wherein the rotating shaft is rotatably connected to the frame, and the first and second cams are sleeved on the rotating shaft; the lower end of the vertical movable block abuts against a peripheral wall of the first cam, and driven by the first cam, the horizontal movable block moves laterally to open the buckle; the peripheral wall of the second cam abuts against the abutment portion, and the movable bracket is driven by the second cam to move the protective cover toward the workpiece, causing the buckle to pass over the lower edge of the workpiece, so that after the buckle-opening assembly is reset and the buckle is released, the buckle secures the workpiece. The assembly device requires a small power source and has low electrical dependence.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical process equipment, and more particularly to an assembly device. Background Art

[0002] Industrial production processes often involve the clamping of a protective cover and a workpiece. In the prior art, two pneumatic cylinders are used to extend and retract the buckle of the protective cover, and a lifting cylinder is used to drive the protective cover to move closer to the workpiece. Specifically, in the process of clamping the protective cover and the workpiece, the two pneumatic cylinders are first extended, and the telescopic rods of the two pneumatic cylinders are inserted into the buckle of the protective cover to open the buckle. Then, the lifting cylinder is used to drive the protective cover closer to the workpiece. When the protective cover is in place, the two pneumatic cylinders are retracted, and the buckle of the protective cover automatically rebounds, clamping the workpiece. This achieves the clamping connection between the protective cover and the workpiece.

[0003] It can be seen from this that the conventional method of assembling the protective cover and the workpiece requires multiple power sources and is highly dependent on electricity.

[0004] Therefore, how to provide an assembly device for assembling a protective cover and a workpiece to reduce the power source and reduce the dependence on electrical components is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of the above, an object of the present invention is to provide an assembly device for mounting a protective cover on a workpiece, which requires a small power source and has low dependence on electrical components.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] An assembly device for mounting a protective cover including a buckle on a workpiece, comprising:

[0008] frame;

[0009] A carrying plate connected to the frame and used for carrying the workpiece;

[0010] A movable bracket is floatingly connected to the frame and includes an abutment portion;

[0011] a cover plate detachably connected to the movable bracket, used for fixing the protective cover arranged with the buckle facing the supporting plate, wherein the cover plate is arranged above the supporting plate and the protective cover is arranged above the workpiece;

[0012] The buckle expansion assembly includes a vertical moving block and a horizontal moving block that contacts and cooperates with the inclined surface of the vertical moving block;

[0013] A rotating shaft, a first cam and a second cam, wherein the rotating shaft is rotatably connected to the frame and is arranged below the carrying plate, and the first cam and the second cam are sleeved on the rotating shaft;

[0014] Among them, the lower end of the vertical moving block abuts against the first cam peripheral wall, so that it is driven by the first cam to make the horizontal moving block move horizontally to open the buckle; the second cam peripheral wall abuts against the abutting portion, so that the movable bracket is driven by the second cam to move, thereby driving the protective cover close to the workpiece, so that the opened buckle passes over the lower edge of the workpiece, so that after the buckle opening assembly is reset and the buckle is released, the buckle clamps the lower edge of the workpiece.

[0015] Optionally, there is a phase difference between the protruding sections of the peripheral walls of the first cam and the second cam, so that when the rotating shaft rotates, there is a timing difference between the action of opening the buckle and the action of bringing the protective cover close to the workpiece.

[0016] Optionally, the first cam is configured such that, counter to the rotation direction of the rotating shaft, the circumferential wall between 0° and N1° is a first protruding section, and the circumferential wall between N1° and 360° is a first regular section; 0° of the circumferential wall of the first cam is a reference angle based on the starting point of the first protruding section;

[0017] The second cam is configured such that, counter to the rotation direction of the rotating shaft, the circumferential wall between 0° and N2° is a second normal segment, and the circumferential wall between N2° and 360° is a second protruding segment; 0° of the circumferential wall of the second cam is a reference angle based on the starting point of the second normal segment;

[0018] Wherein, in the initial state, the 0° position of the peripheral wall of the first cam contacts the lower end of the vertical moving block; the 0° position of the peripheral wall of the second cam contacts the interference portion; 0<N2<N1<360.

[0019] Optionally, the first protruding section includes: a first rising protruding section between 0° and N2°, a first constant height protruding section between N2° and N3°, and a first falling protruding section between N3° and N1°;

[0020] The second protruding section includes: a second rising protruding section between N2° and N3°, a second constant height protruding section between N3° and N1°, and a second descending protruding section between N1° and 360°;

[0021] Among them, N2<N3<N1.

[0022] Optionally, N1 is 270, N2 is 90, and N3 is 180.

[0023] Optionally, the assembly device includes two frames and two movable brackets, and the two frames are respectively connected to two ends of the carrying plate;

[0024] The two movable brackets are respectively arranged at both ends of the bearing plate and are respectively connected to the two frames in a floating manner;

[0025] The cover plate has clamping parts at both ends, and the two movable brackets respectively have clamping matching parts adapted to the clamping parts.

[0026] Optionally, the cover plate is provided with:

[0027] A handle, movable laterally;

[0028] A clamping block, which is laterally movable, is connected to the handle and is provided with the clamping portion;

[0029] The first elastic member is arranged on the cover plate in a transverse direction and contacts the clamping block, so as to provide elastic tension for the clamping block.

[0030] Optionally, it also includes:

[0031] A slide rail arranged vertically and a slider slidably engaged with the slide rail;

[0032] One of the slide rail and the slider is arranged on the frame, and the other is arranged on the movable bracket.

[0033] Optionally, the interference portion is configured as an upward-facing interference surface;

[0034] The movable bracket is adapted to move downward under the interference of the second cam;

[0035] It also includes a second elastic member, which is arranged between the movable bracket and the frame and is used to provide an upward elastic force to the movable bracket.

[0036] Optionally, the cover plate includes an air pipe and a suction nozzle connected thereto, the air pipe is used to be connected to a negative pressure system, and the suction nozzle is used to adsorb and fix the protective cover under the action of negative pressure.

[0037] Optionally, it also includes:

[0038] a third elastic member and / or a fourth elastic member;

[0039] The third elastic member is provided between the bearing plate and the vertical moving block, and is used to provide a downward elastic force to the vertical moving block;

[0040] The fourth elastic member is disposed between the frame and the transverse moving block, and is used to provide an elastic force opposite to the expansion direction to the transverse moving block.

[0041] Optionally, it also includes:

[0042] A rotating handle connected to the rotating shaft;

[0043] a pin hole, and an elastic pin adapted to be inserted into the pin hole, wherein one of the elastic pin and the pin hole is disposed on the rotating handle, and the other is disposed on the frame; a surface of the elastic pin facing the rotating direction of the rotating handle comprises a third inclined surface or an arc surface, and a surface facing away from the rotating direction of the rotating handle comprises a flat surface;

[0044] Wherein, the elastic pin retracts when the third inclined surface or the arc surface is abutted by the pin hole wall to allow the rotating handle to rotate; the elastic pin limits the rotation of the rotating handle when the plane is abutted by the pin hole wall.

[0045] Optionally, it also includes:

[0046] Limiting grooves and elastic limiting parts;

[0047] One of the limiting groove and the elastic limiting member is provided on the rotating handle, and the other is provided on the frame;

[0048] When the action of opening the buckle and the action of the protective cover approaching the workpiece are completed, the elastic limiting member springs into the limiting groove;

[0049] When the action of opening the buckle and the action of the protective cover approaching the workpiece begin, the elastic limiting member disengages from the limiting groove.

[0050] The assembly device provided by the present invention, when working, places the workpiece on the carrier plate, and uses the cover plate to fix the protective cover, at this time, the buckle of the protective cover is arranged toward the carrier plate; the cover plate is connected to the movable bracket so that the cover plate is arranged above the carrier plate and the protective cover is arranged above the workpiece; in this case, when the rotating shaft is rotated, the rotating shaft drives the first cam and the second cam to rotate together, and since the lower end of the vertical moving block contacts the peripheral wall of the first cam, when the first cam rotates, it drives the vertical moving block to move vertically, and then the vertical moving block drives the lateral moving block to move horizontally through the contact cooperation of the inclined surface, so that the lateral moving push The buckle of the movable protective cover is stretched laterally; in addition, the peripheral wall of the second cam contacts the interference part, and when the second cam rotates, the movable bracket is driven to move through the interference part, and then the movable bracket drives the cover plate and the protective cover to move together, so that the protective cover is close to the workpiece, and then the stretched buckle passes over the lower edge of the workpiece; in this way, when the buckle stretching assembly is reset, the vertical moving block and the horizontal moving block are restored to their original positions, and the horizontal moving block releases the buckle, the buckle can be reset under the action of its own elastic restoring force, clamping the lower edge of the workpiece, thereby realizing the clamping connection between the protective cover and the workpiece, so that the protective cover including the buckle is installed on the workpiece.

[0051] From this, it can be seen that the assembly device only requires a single power source to drive the rotation of the rotating shaft. The rotation of the first and second cams mounted on the same rotating shaft transmits power to the buckle expansion assembly and the movable bracket, respectively, so that the buckle expansion assembly and the movable bracket can work simultaneously without affecting each other. The buckle expansion assembly and the movable bracket perform different actions at different times, so that the buckle expansion and the action of bringing the protective cover close to the workpiece are carried out in an orderly manner, so as to achieve the clamping connection between the protective cover and the workpiece. It can be seen that the assembly device reduces the complexity of the power source. Moreover, compared with the existing technology that achieves the clamping connection between the protective cover and the workpiece through the action of multiple cylinders, the assembly device uses pure mechanical transmission during the power transmission process, reducing the dependence on electricity. Therefore, it can effectively avoid the safety hazards caused by electrical components. At the same time, it reduces the cost of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0053] Figure 1 A schematic structural diagram of an assembly device provided in a specific embodiment of the present invention;

[0054] Figure 2 for Figure 1 Exploded diagram;

[0055] Figure 3 This is a schematic diagram of the structure of the protective cover when the buckle clamps the workpiece;

[0056] Figure 4 Schematic diagram of the relative position relationship among the first cam, the vertical moving block, the horizontal moving block and the protective cover;

[0057] Figure 5 It is a partial structural diagram of the first cam, the vertical moving block and the horizontal moving block;

[0058] Figure 6 for Figure 5 The main view;

[0059] Figure 7 It is a schematic diagram of the structure after the frame, movable bracket, rotating shaft, first cam and second cam are assembled;

[0060] Figure 8 This is a schematic diagram of the gear position when the handle is rotated counterclockwise for one circle;

[0061] Figure 9This is a schematic diagram of the position states of the first cam and the vertical moving block when the rotary handle rotates counterclockwise for one circle;

[0062] Figure 10 This is a schematic diagram of the position of the second cam and the movable bracket when the rotary handle rotates counterclockwise for one circle;

[0063] Figure 11 This is a schematic diagram of the relative position relationship between the buckle and the lateral moving block when the rotary handle rotates counterclockwise for one circle;

[0064] Figure 12 It is a cross-sectional view of the cooperation between the rotary handle and the elastic pin;

[0065] Figure 13 This is a schematic diagram of the structure after the rotating shaft, the first cam, the second cam and the rotating handle are assembled.

[0066] Figures 1 to 13 The reference numerals in the figures are as follows:

[0067] 1 is a frame, 11 is a slide rail, 12 is an elastic pin, 121 is a third inclined surface, 122 is a plane, 13 is an elastic limiting member, 2 is a carrying plate, 3 is a movable bracket, 31 is a snap-fitting portion, 32 is a slider, 33 is a resistance portion, 331 is a resistance surface, 34 is a second elastic member, 4 is a cover plate, 41 is a handle, 42 is a snap-fitting block, 421 is a snap-fitting portion, 43 is a first elastic member, 5 is a snap-fitting assembly, 51 is a vertical moving block, 511 is a first inclined surface, 52 is a horizontal moving block, 521 is a second inclined surface, 53 is a third elastic member, 54 is a fourth elastic member, 6 is a rotating shaft, 7 is a first cam, 71 is a first protruding section, 72 is a first conventional section, 8 is a second cam, 81 is a second protruding section, 82 is a second conventional section, 9 is a rotating handle, 91 is a pin hole, and 92 is a limiting slot;

[0068] 10 is a protective cover, 101 is a buckle, and 20 is a workpiece. DETAILED DESCRIPTION

[0069] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0070] The embodiments of the present application aim to provide one or more assembly devices for installing a protective cover on a workpiece, which require a small power source and have low dependence on electrical components.

[0071] Please refer to Figure 1 and Figure 2, an embodiment of the present invention provides an assembly device for mounting a protective cover 10 including a buckle 101 on a workpiece 20 (such as Figure 3 As shown), the assembly device includes a frame 1, a load-bearing plate 2, a movable bracket 3, a cover plate 4, a buckle-opening assembly 5, a rotating shaft 6, a first cam 7, and a second cam 8. The frame 1 mainly plays a bearing role, the load-bearing plate 2 is connected to the frame 1, and the load-bearing plate 2 is used to carry the workpiece 20; the movable bracket 3 is floatingly connected to the frame 1, and the movable bracket 3 includes a resistance portion 33; the cover plate 4 is detachably connected to the movable bracket 3, and is used to fix the buckle 101 toward the protective cover 10 arranged on the load-bearing plate 2. The cover plate 4 is arranged above the load-bearing plate 2, and the protective cover 10 is arranged above the workpiece 20; the buckle-opening assembly 5 includes a vertical moving block 51, and a horizontal moving block 52 (as shown) that is in resistance with the inclined surface of the vertical moving block 51. Figure 4 As shown); the rotating shaft 6 is rotatably connected to the frame 1 and is arranged below the supporting plate 2, and the first cam 7 and the second cam 8 are sleeved on the rotating shaft 6; wherein, the lower end of the vertical moving block 51 abuts against the peripheral wall of the first cam 7, so that it is driven by the first cam 7 to move the lateral moving block 52 laterally to open the buckle 101; the peripheral wall of the second cam 8 abuts against the abutting portion 33, so that the movable bracket 3 is driven by the second cam 8 to move, thereby driving the protective cover 10 to approach the workpiece 20, so that the expanded buckle 101 passes over the lower edge of the workpiece 20, so that after the buckle opening assembly 5 is reset to release the buckle 101, the buckle 101 clamps the lower edge of the workpiece 20.

[0072] In the embodiment of the present application, the workpiece 20 is a middle frame component of an electronic device, or a back cover, or a glass cover, but this is not a limitation on the specific type of the workpiece 20.

[0073] During operation, the workpiece 20 is placed on the carrier plate 2, and the protective cover 10 is fixed by the cover plate 4. At this time, the buckle 101 of the protective cover 10 is arranged toward the carrier plate 2; the cover plate 4 is connected to the movable bracket 3 so that the cover plate 4 is arranged above the carrier plate 2, and the protective cover 10 is arranged above the workpiece 20; in this case, when the rotating shaft 6 is rotated, the rotating shaft 6 drives the first cam 7 and the second cam 8 to rotate together. Since the lower end of the vertical moving block 51 abuts against the peripheral wall of the first cam 7, when the first cam 7 rotates, the vertical moving block 51 is driven to move vertically, and then the vertical moving block 51 drives the lateral moving block 52 to move horizontally through the inclined surface abutment, so that the lateral movement pushes the buckle 101 of the protective cover 10 to move horizontally. to be stretched; in addition, the peripheral wall of the second cam 8 abuts the abutment portion 33. When the second cam 8 rotates, the movable bracket 3 is driven to move through the abutment portion 33, and then the movable bracket 3 drives the cover plate 4 and the protective cover 10 to move together, so that the protective cover 10 is close to the workpiece 20, and then the stretched buckle 101 passes over the lower edge of the workpiece 20; in this way, when the buckle stretching assembly 5 is reset, the vertical moving block 51 and the horizontal moving block 52 are restored to their original positions, and the horizontal moving block 52 releases the buckle 101, the buckle 101 can be reset under the action of its own elastic restoring force, clamping the lower edge of the workpiece 20, thereby realizing the clamping connection between the protective cover 10 and the workpiece 20, so that the protective cover 10 including the buckle 101 is installed on the workpiece 20.

[0074] It can be seen from this that the assembly device only requires a single power source to drive the rotating shaft 6 to rotate. The rotation of the first cam 7 and the second cam 8 mounted on the same rotating shaft 6 transmits power to the buckle expansion assembly 5 and the movable bracket 3 respectively, so that the buckle expansion assembly 5 and the movable bracket 3 can work simultaneously without affecting each other. The buckle expansion assembly 5 and the movable bracket 3 perform different actions at different times, so that the buckle 101 expands and the protective cover 10 approaches the workpiece 20 in an orderly manner, so as to achieve the clamping connection between the protective cover 10 and the workpiece 20. It can be seen that the assembly device reduces the complexity of the power source; moreover, compared with the prior art that achieves the clamping connection between the protective cover 10 and the workpiece 20 through the action of multiple cylinders, the assembly device uses pure mechanical transmission during the power transmission process, reducing the dependence on electricity. Therefore, it can effectively avoid the safety hazards caused by electrical components. At the same time, it reduces the cost of the device.

[0075] It should be noted that the buckle opening assembly 5 in this embodiment includes a vertical moving block 51 and a horizontal moving block 52, and by making the inclined surfaces of the vertical moving block 51 and the horizontal moving block 52 interfere with each other, the vertical movement of the vertical moving block 51 is converted into the horizontal movement of the horizontal moving block 52, so that when the vertical moving block 51 moves vertically, the horizontal moving block 52 opens the buckle 101 horizontally; this can ensure that the buckle 101 is only subjected to the horizontal opening force, and avoid the buckle 101 being subjected to forces in other directions, causing damage to the buckle 101; in addition, it is also conducive to the reasonable layout of the position of the vertical moving block 51 relative to the buckle 101, which is convenient for structural design.

[0076] Please refer to Figure 4-6 The vertical moving block 51 is provided with a first inclined surface 511, and the lateral moving block 52 is provided with a second inclined surface 521. The first inclined surface 511 and the second inclined surface 521 are in contact with each other. When the vertical moving block 51 moves vertically, the first inclined surface 511 generates a lateral thrust on the second inclined surface 521, causing the lateral moving block 52 to move horizontally.

[0077] Of course, in other embodiments, the buckle opening assembly 5 may only include a vertical moving block 51, and the first inclined surface 511 of the vertical moving block 51 is used to directly open the buckle 101 horizontally. However, at this time, the buckle 101 is still subjected to vertical external force, which can easily damage the buckle 101.

[0078] It is understandable that if Figure 4 As shown, the lower end of the vertical moving block 51 abuts against the first cam 7 , that is, the vertical moving block 51 is adapted to move upward under the abutment of the first cam 7 .

[0079] For further information, please refer to Figure 5 and Figure 6 In some embodiments, the assembly device further includes a third elastic member 53 and / or a fourth elastic member 54; the third elastic member 53 is arranged between the supporting plate 2 and the vertical moving block 51, and is used to provide a downward elastic force to the vertical moving block 51; the fourth elastic member 54 is arranged between the frame 1 and the horizontal moving block 52, and is used to provide an elastic force to the horizontal moving block 52 in the opposite direction of the expansion direction.

[0080] That is to say, when the rotating shaft 6 rotates, under the resistance of the first cam 7, a thrust is generated on the vertical moving block 51, causing the vertical moving block 51 to move upward, and then the lateral moving block 52 to move laterally, opening the buckle 101; in this process, the vertical moving block 51 squeezes or stretches the third elastic member 53, and the lateral moving block 52 squeezes or stretches the fourth elastic member 54, causing the third elastic member 53 and the fourth elastic member 54 to undergo elastic deformation, generating an elastic force; when the first cam 7 rotates to the point where no thrust is generated on the vertical moving block 51, the elastic force of the third elastic member 53 is utilized to reset the lateral moving block 52 laterally away from the buckle 101, so that the buckle 101 rebounds by its own elastic restoring force, thereby clamping the workpiece 20; at the same time, the elastic force of the fourth elastic member 54 is utilized to cause the vertical moving block 51 to move vertically downward, so as to reset the vertical moving block 51, which is also beneficial for ensuring that the vertical moving block 51 is always in contact with the first cam 7. It can be understood that the elastic force of the third elastic member 53 and the fourth elastic member 54 is controllable. Compared with the prior art, the uncontrollable force factor of the pneumatic components is eliminated, which is conducive to improving product yield.

[0081] In addition, it should be noted that the above embodiment does not limit the interference mode between the second cam 8 and the interference portion 33. Figure 7 As shown, in some embodiments, the interference portion 33 is configured as an upward interference surface 331, and the movable bracket 3 is suitable for moving downward under the interference of the second cam 8; the assembly device also includes a second elastic member 34, which is arranged between the movable bracket 3 and the frame 1, and is used to provide an upward elastic force to the movable bracket 3.

[0082] That is, when the rotating shaft 6 rotates, the second cam 8 interferes with the contact surface 331 of the movable bracket 3, generating a thrust, causing the movable bracket 3 to move downward, driving the protective cover 10 downward toward the workpiece 20; during this process, the movable bracket 3 squeezes or stretches the second elastic member 34, causing the second elastic member 34 to elastically deform and generate an elastic force; when the second cam 8 rotates to the point where it no longer generates a thrust on the contact surface 331 of the movable bracket 3, the elastic force of the second elastic member 34 is utilized to move the movable bracket 3 upward, so that the second cam 8 is always in contact with the contact surface 331, and ensures that the protective cover 10 is reset after being engaged with the workpiece 20. It can be understood that the elastic force of the second elastic member 34 is controllable, which eliminates the uncontrollable force of the pneumatic component compared to the prior art, and is conducive to improving product yield.

[0083] In order to ensure that the action of opening the buckle 101 and the action of bringing the protective cover 10 close to the workpiece 20 are carried out in an orderly manner, in some embodiments, there is a phase difference between the protruding sections of the peripheral walls of the first cam 7 and the second cam 8, so that when the rotating shaft 6 rotates, there is a timing difference between the action of opening the buckle 101 and the action of bringing the protective cover 10 close to the workpiece 20.

[0084] It should be noted that the protruding sections of the circumferential walls of the first cam 7 and the second cam 8 are respectively relative to the regular sections of the circumferential walls of the first cam 7 and the second cam 8. The regular section is defined as a section of an arcuate wall with the smallest radial dimension on the circumferential wall of the first cam 7 or the second cam 8, and the protruding section is a section of an arcuate wall with a radial dimension on the circumferential wall of the first cam 7 or the second cam 8 that is larger than the radial dimension of the regular section, that is, the protruding section is protruding relative to the regular section.

[0085] It can be seen from this that this embodiment creates a phase difference between the protruding segments of the peripheral walls of the first cam 7 and the second cam 8, so that when the first cam 7 and the second cam 8 rotate synchronously with the rotating shaft 6, the protruding segments of the first cam 7 and the protruding segments of the second cam 8 do not act on the buckle opening assembly 5 and the movable bracket 3 at the same time, thereby staggering the movements of the buckle opening assembly 5 and the movable bracket 3. Therefore, the action of opening the buckle 101 and the action of bringing the protective cover 10 close to the workpiece 20 are staggered in timing, ensuring that the action of opening the buckle 101 is performed before the action of bringing the protective cover 10 close to the workpiece 20, thereby ensuring that the process of engaging the buckle 101 with the workpiece 20 can be smoothly and orderly achieved. In this application, the phase difference is defined as the situation where, with the cross section of the rotating shaft 6 as a common reference plane, the protruding segments of the first cam 7 and the second cam 8 have different or non-identical orientation ranges.

[0086] Further, in some embodiments, the first cam 7 is configured as follows: opposite to the rotation direction of the rotating shaft 6, the circumferential wall between 0°-N1° is the first protruding section 71, and the circumferential wall between N1°-360° is the first conventional section 72; 0° of the circumferential wall of the first cam 7 is a reference angle based on the starting point of the first protruding section 71; the second cam 8 is configured as follows: opposite to the rotation direction of the rotating shaft 6, the circumferential wall between 0°-N2° is the second conventional section 82, and the circumferential wall between N2°-360° is the second protruding section 81; 0° of the circumferential wall of the second cam 8 is a reference angle based on the starting point of the second conventional section 82; wherein, in the initial state, the 0° position of the circumferential wall of the first cam 7 contacts the lower end of the vertical moving block 51; the 0° position of the circumferential wall of the second cam 8 contacts the interference portion 33; 0<N2<N1<360.

[0087] In this application, the initial state is defined as a state in which the workpiece 20 is mounted on the carrier plate 2 , the protective cover 10 is fixed on the cover plate 4 , and the cover plate 4 is connected to the movable bracket 3 , and the assembly device is ready for assembly.

[0088] Please refer to Figure 7It can be understood that, according to the above definitions of the protruding section and the conventional section, the first conventional section 72 is the first lowest position where the first cam 7 contacts the lower end of the vertical moving block 51, and the first protruding section 71 is a position higher than the first lowest position where the first cam 7 contacts the lower end of the vertical moving block 51; the second conventional section 82 is the second lowest position where the second cam 8 contacts the contact portion 33, and the second protruding section 81 is a position higher than the second lowest position where the second cam 8 contacts the contact portion 33.

[0089] Furthermore, it is understood that, for both the first cam 7 and the second cam 8, 360° of the peripheral wall is the angle of one rotation relative to the respective 0°, that is, 360° is the angle that coincides with 0°. Furthermore, when defining the initial state, the initial position angle of the rotating shaft 6 is 0°.

[0090] When the rotating shaft 6 rotates N2° from its initial position, the circumferential wall between 0° and N2° of the first cam 7 is part of the circumferential wall between 0° and N1°, and is therefore part of the first protruding section 71. Therefore, under the pushing action of the first cam 7, the vertical moving block 51 moves vertically, and the lateral moving block 52 moves laterally to open the buckle 101. During this process, the circumferential wall between 0° and N2° of the second cam 8 is the second regular section 82, that is, the second lowest position of the second cam 8 always contacts the contact portion 33, so that the position of the movable bracket 3 remains unchanged. At this time, the position of the protective cover 10 also remains unchanged. It can be seen that this configuration allows the action of opening the buckle 101 to occur before the action of the protective cover 10 approaching the workpiece 20.

[0091] When the rotating shaft 6 rotates from N2° to N1°, the circumferential wall between N2° and N1° of the first cam 7 still belongs to the first protruding section 71. Since the circumferential wall between N1° and 360° of the first cam 7 is the first regular section 72, that is, N1° of the first cam 7 is the dividing point between the first protruding section 71 and the first regular section 72 of the first cam 7, this process at least includes the process of the first cam 7 removing the thrust generated on the vertical movable block 51, which is conducive to moving the horizontal movable block 52 away from the buckle 101. In this process, since the circumferential wall between N2° and N1° of the second cam 8 is part of the circumferential wall between N2° and 360°, and belongs to the second protruding section 81, the pushing action of the second protruding section 81 causes the interference portion 33 to drive the movable bracket 3 to move, and the movable bracket 3 then drives the protective cover 10 to approach the workpiece 20, so that the expanded buckle 101 passes over the lower edge of the workpiece 20. That is, this process can enable the protective cover 10 to approach the workpiece 20 and facilitate the resetting of the buckle expansion assembly 5 to release the buckle 101 .

[0092] When the rotating shaft 6 rotates from N1° to 360°, the peripheral wall between N1° and 360° of the first cam 7 is the first conventional section 72, so that the position of the buckle expansion component 5 remains unchanged; the peripheral wall between N1° and 360° of the second cam 8 is part of the peripheral wall between N2° and 360°, and belongs to the second protruding section 81. Therefore, this process at least includes the process of removing the second cam 8 to generate thrust on the movable bracket 3, which is conducive to resetting the protective cover 10 after being engaged with the workpiece 20.

[0093] From this, it can be seen that the configuration of the first cam 7 and the second cam 8 in this embodiment is such that when the rotating shaft 6 rotates, there is a phase difference between the first protruding section 71 of the first cam 7 and the second protruding section 81 of the second cam 8, so that there is a timing difference between the action of stretching out the buckle 101 and the action of bringing the protective cover 10 close to the workpiece 20.

[0094] Furthermore, in order to ensure that there is no timing overlap between the action of opening the buckle 101 and the action of bringing the protective cover 10 close to the workpiece 20, and to ensure the mutual independence of the two actions in timing, in some embodiments, the first protruding section 71 includes: a first lifting protruding section between 0°-N2°, a first equal-height protruding section between N2°-N3°, and a first descending protruding section between N3°-N1°; the second protruding section 81 includes: a second lifting protruding section between N2°-N3°, a second equal-height protruding section between N3°-N1°, and a second descending protruding section between N1°-360°; wherein, N2<N3<N1.

[0095] It should be noted that the first lift protruding section refers to an arcuate wall on the circumferential wall of the first cam 7 whose radial dimension gradually increases in the direction opposite to the rotation direction of the rotating shaft 6; the first constant-height protruding section refers to an arcuate wall on the circumferential wall of the first cam 7 whose radial dimension is equal to and greater than the radial dimension of the first regular section 72; and the first falling-stroke protruding section refers to an arcuate wall on the circumferential wall of the first cam 7 whose radial dimension gradually decreases in the direction opposite to the rotation direction of the rotating shaft 6. Similarly, the second lift protruding section refers to an arcuate wall on the circumferential wall of the second cam 8 whose radial dimension gradually increases in the direction opposite to the rotation direction of the rotating shaft 6; the second constant-height protruding section refers to an arcuate wall on the circumferential wall of the second cam 8 whose radial dimension is equal to and greater than the radial dimension of the second regular section 82; and the second falling-stroke protruding section refers to an arcuate wall on the circumferential wall of the second cam 8 whose radial dimension gradually decreases in the direction opposite to the rotation direction of the rotating shaft 6.

[0096] Please refer to Figure 8-11As the rotating shaft 6 rotates from 0° to N2° along its rotational direction, the first cam 7's circumferential wall between 0° and N2° forms the first lift protruding section. Therefore, under the pushing action of the first lift protruding section, the vertical moving block 51 moves vertically upward, thereby causing the lateral moving block 52 to move laterally, opening the buckle 101. Simultaneously, during this process, the second cam 8's circumferential wall between 0° and N2° forms the second normal section 82, meaning that the second lowest position of the second cam 8 always contacts the interference portion 33, maintaining the position of the movable bracket 3 unchanged. At this time, the position of the protective cover 10 also remains unchanged.

[0097] As the shaft 6 rotates from N2° to N3° along its rotational direction, the first cam 7's circumferential wall between N2° and N3° forms a first uniformly protruding section, and the radial dimension of the first uniformly protruding section does not change. Therefore, the buckle-opening assembly 5 maintains its position, keeping the buckle 101 in the open state. During this process, the second cam 8's circumferential wall between N2° and N3° forms a second lift-protruding section. Therefore, the second lift-protruding section pushes against the abutment 33, causing the movable bracket 3 to move. This in turn causes the movable bracket 3 to drive the protective cover 10 toward the workpiece 20, allowing the opened buckle 101 to pass over the lower edge of the workpiece 20.

[0098] When the rotating shaft 6 rotates from N3° to N1° along its rotation direction, since the peripheral wall between N3° and N1° of the first cam 7 forms a first descending protrusion, the first cam 7 tends to move away from the vertical movable block 51 under the action of the first descending protrusion. This facilitates the downward movement of the vertical movable block 51, causing the lateral movable block 52 to move laterally to release the buckle 101. At this time, the buckle 101 clamps the lower edge of the workpiece 20 under the action of its own elastic restoring force. During this process, since the peripheral wall between N3° and N1° of the second cam 8 forms a second uniform height protrusion, the radial dimension of the second uniform height protrusion does not change. Therefore, the position of the movable bracket 3 remains unchanged, that is, the position of the protective cover 10 remains unchanged, which facilitates the alignment of the buckle 101 with the lower edge of the workpiece 20 for clamping.

[0099] As the rotating shaft 6 rotates from N1° to 360° along its rotational direction, the first cam 7's first lowest position always abuts the lower end of the vertically movable block 51, maintaining the position of the buckle-opening assembly 5, because the peripheral wall between N1° and 360° of the first cam 7 forms the first normal section 72. During this process, the second cam 8's peripheral wall between N1° and 360° forms the second descending protruding section. Therefore, under the action of the second descending protruding section, the second cam 8 tends to move away from the movable bracket 3, facilitating the movable bracket 3 to move the protective cover 10 and the workpiece 20 engaged therewith to the protective cover 10 to its initial position, thereby facilitating the removal of the workpiece 20 with the protective cover 10 mounted thereon.

[0100] It can be seen from this that in this embodiment, four actions can be completed during the process of the rotating shaft 6 rotating one circle, namely: the action of opening the buckle 101, the action of the protective cover 10 approaching the workpiece 20, the action of the buckle opening component 5 releasing the buckle 101, and the action of resetting the protective cover 10 and the workpiece 20 after installation. These four actions have no intersection in time sequence and are completed independently in sequence, which is conducive to ensuring the smooth and effective installation of the protective cover 10 and the workpiece 20.

[0101] It should be noted that the above embodiment does not limit the specific values of N1, N2, and N3. In some embodiments, N1 is 270, N2 is 90, and N3 is 180. That is, in this embodiment, the peripheral walls of the first cam 7 and the second cam 8 are divided into four equal parts along the circumferential direction, so that every time the first cam 7 rotates 90°, the buckle expansion assembly 5 corresponds to an action process or a position state; every time the second cam 8 rotates 90°, the movable bracket 3 corresponds to an action process or a position state. This helps to ensure the balance of the action of expanding the buckle 101, the action of the protective cover 10 approaching the workpiece 20, the action of the buckle expansion assembly 5 releasing the buckle 101, and the action of the protective cover 10 and the workpiece 20 being reassembled after installation.

[0102] It can be understood that when the rotating shaft 6 rotates from 0° to 90°, the buckle 101 is opened; when the rotating shaft 6 rotates from 90° to 180°, the protective cover 10 is moved closer to the workpiece 20; when the rotating shaft 6 rotates from 180° to 270°, the buckle opening assembly 5 releases the buckle 101; and when the rotating shaft 6 rotates from 270° to 360°, the protective cover 10 and the workpiece 20 are reattached after installation. One rotation of the rotating shaft 6 completes the engagement of one protective cover 10 with one workpiece 20.

[0103] It should be noted that the above embodiments do not limit the specific method of driving the rotating shaft 6 to rotate. For example, a rotating power mechanism (such as a motor) can be provided to drive the rotating shaft 6 to rotate automatically.

[0104] To avoid over-reliance on electrical power sources and to facilitate operation at any time, please refer to Figure 7 and Figure 8 In some embodiments, the assembly device further includes a rotary handle 9 connected to the rotating shaft 6. In other words, this embodiment facilitates manual operation by providing the rotary handle 9. By rotating the rotary handle 9, the rotating shaft 6 is rotated, and the protective cover 10 and the workpiece 20 can be assembled at any time without being restricted by an electrical power source. The structure is simple and the device cost can also be reduced.

[0105] When the rotating handle 9 is turned to drive the rotating shaft 6 to rotate, in order to prevent the rotating handle 9 from rotating in the opposite direction, the movement direction and action sequence of the buckle expansion component 5 and the movable bracket 3 will change, and the protective cover 10 and the workpiece 20 will not be connected. Please refer to Figure 12 In some embodiments, the assembly device further includes a pin hole 91 and an elastic pin 12 suitable for inserting into the pin hole 91, one of the elastic pin 12 and the pin hole 91 is arranged on the rotating handle 9, and the other is arranged on the frame 1; the surface of the elastic pin 12 facing the rotation direction of the rotating handle 9 includes a third inclined surface 121 or an arc surface, and the surface facing away from the rotation direction of the rotating handle 9 includes a flat surface 122; wherein, the elastic pin 12 retracts when the third inclined surface 121 or the arc surface is interfered with by the wall of the pin hole 91 to allow the rotating handle 9 to rotate; when the flat surface 122 of the elastic pin 12 is interfered with by the wall of the pin hole 91, the rotation of the rotating handle 9 is restricted.

[0106] That is to say, when the rotating handle 9 is rotated along the rotation direction of the rotating shaft 6, the third inclined surface 121 or arc surface of the elastic pin 12 is resisted by the wall of the pin hole 91, causing the elastic pin 12 to retract, so that the rotating handle 9 can rotate smoothly, so that the rotating handle 9 drives the rotating shaft 6 to rotate along its rotation direction, so that the action of opening the buckle 101, the action of the protective cover 10 approaching the workpiece 20, and the action of the buckle opening assembly 5 releasing the buckle 101 are carried out in order, thereby realizing the buckle 101 and the workpiece 20 being engaged.

[0107] When the rotating handle 9 is rotated in the opposite direction of the rotation of the rotating shaft 6, the flat surface 122 of the elastic pin 12 is abutted by the wall of the pin hole 91, so that the rotating handle 9 cannot be rotated. That is, when the operator rotates the rotating handle 9 in the opposite direction, the rotating handle 9 cannot be rotated. Therefore, misoperation can be avoided, the rotating shaft 6 is prevented from rotating in the opposite direction of its rotation, and the correctness of the rotation direction of the rotating shaft 6 is ensured.

[0108] In addition, in order to facilitate the operator to identify whether the action of opening the buckle 101 and the action of the protective cover 10 approaching the workpiece 20 are completed, please combine Figure 2 and Figure 13 In some embodiments, the assembly device further includes a limit groove 92 and an elastic limit member 13; one of the limit groove 92 and the elastic limit member 13 is set on the rotating handle 9, and the other is set on the frame 1; when the action of opening the buckle 101 and the action of the protective cover 10 approaching the workpiece 20 are completed, the elastic limit member 13 pops into the limit groove 92; when the action of opening the buckle 101 and the action of the protective cover 10 approaching the workpiece 20 begin, the elastic limit member 13 disengages from the limit groove 92.

[0109] It is understood that when the elastic limiting member 13 springs into the limiting groove 92, it limits the rotating handle 9, causing the rotating handle 9 to remain in its position; when the elastic limiting member 13 needs to be released from the limiting groove 92, sufficient external force needs to be applied to the rotating handle 9 to release the elastic limiting member 13 from the limiting groove 92, thereby releasing the limit on the rotating handle 9 and allowing the rotating handle 9 to continue rotating. In other words, during the rotation of the rotating handle 9, as the elastic limiting member 13 continuously springs into or out of the limiting groove 92, the rotating handle 9 has a gear concept, allowing the operator to determine which stage of the entire process of installing the protective cover 10 on the workpiece 20 is in by feel.

[0110] For example, in some embodiments, the rotating handle 9 has four gears, namely a first gear, a second gear, a third gear, and a fourth gear; the first gear, the second gear, the third gear, and the fourth gear correspond to four angles of the rotating shaft along its rotation direction, namely: 0°, N2°, N3°, and N1°, respectively, wherein N2°, N3°, and N1° are 90°, 180°, and 270°, respectively. The rotation direction of the rotating shaft 6 is defined as counterclockwise.

[0111] That is, when the rotary handle 9 is rotated from the first gear to the second gear, the elastic limit member 13 springs into the limit slot 92, indicating that the buckle opening assembly 5 has completed the action of opening the buckle 101 under the drive of the first cam 7. When the rotary handle 9 is rotated away from the second gear, the elastic limit member 13 disengages from the limit slot 92, allowing the rotary handle 9 to rotate from the second gear to the third gear. When the elastic limit member 13 springs into the limit slot 92 again, it indicates that the action of the protective cover 10 approaching the workpiece 20 is complete. When the rotary handle 9 is rotated away from the third gear, the elastic limit member 13 disengages from the limit slot 92, allowing the rotary handle 9 to rotate from the third gear to the fourth gear. When the elastic limit member 13 springs into the limit slot 92 again, it indicates that the buckle opening assembly 5 has completed the action of releasing the buckle 101. When the rotary handle 9 is rotated out of the fourth gear, the elastic limit member 13 disengages the limit slot 92, allowing the rotary handle 9 to be rotated back to the first gear from the fourth gear. When the elastic limit member 13 re-enters the limit slot 92, it indicates that the protective cover 10 and the workpiece 20 engaged therewith have moved together to the initial position of the protective cover 10, making it easier to remove the workpiece 20 with the protective cover 10 installed and to install the protective cover 10 on the next workpiece 20. This reciprocating process completes the installation of the protective cover 10 on one workpiece 20 with each rotation of the rotary handle 9.

[0112] In addition, the above embodiments do not limit the specific arrangement of the frame 1 , the movable bracket 3 and the cover 4 .

[0113] Please continue to refer to Figure 1 and 2In some embodiments, the assembly device includes two frames 1 and two movable brackets 3, the two frames 1 are respectively connected to the two ends of the supporting plate 2; the two movable brackets 3 are respectively arranged at the two ends of the supporting plate 2, and the two movable brackets 3 are respectively movably connected to the two frames 1; there are clamping parts 421 at both ends of the cover plate 4, and the two movable brackets 3 respectively have clamping fitting parts 31 adapted to the clamping parts 421.

[0114] In other words, this embodiment utilizes two frames 1 arranged at opposite ends to support the carrier plate 2, and utilizes two movable brackets 3 at opposite ends to drive the movement of the cover plate 4, thereby ensuring the relative positioning of the protective cover 10 and the workpiece 20 and facilitating assembly of the protective cover 10 and the workpiece 20, resulting in a simple structure. Furthermore, the connection between the cover plate 4 and the movable bracket 3 is achieved through the adaptive engagement of the snap-fit portion 421 and the snap-fit portion 31, facilitating assembly and disassembly of the cover plate 4, facilitating removal of the workpiece 20 with the protective cover 10 installed, and securing the protective cover 10 to be installed.

[0115] Furthermore, in order to facilitate the detachable connection of the cover plate 4 to the movable bracket 3, as shown in FIG. Figure 2 As shown, in some embodiments, the cover plate 4 is provided with a handle 41, a clamping block 42 and a first elastic member 43. The handle 41 and the clamping block 42 can both move laterally. The handle 41 is used for the operator to grasp, the clamping block 42 is connected to the handle 41, and a clamping portion 421 is provided at the end of the clamping block 42; the first elastic member 43 is arranged laterally on the cover plate 4 and one end thereof contacts the clamping block 42, which is used to provide elastic tension for the clamping block 42. During use, the operator applies an external force to the handle 41, causing the handle 41 to move the clamping block 42 laterally, so that the clamping portion 421 can be inserted into the clamping portion 31 of the movable bracket 3. During the lateral movement of the clamping block 42, the clamping block 42 squeezes or stretches the first elastic member 43, causing the first elastic member 43 to produce elastic deformation. When the clamping portion 421 is aligned with the clamping portion 31, the handle 41 is released, and the elastic force of the first elastic member 43 causes the clamping portion 421 to snap into the clamping portion 31, thereby connecting the cover 4 to the movable bracket 3. When the cover 4 needs to be removed, an external force is applied to the handle 41 to move the clamping block 42 laterally, driving the clamping portion 421 out of the clamping portion 31.

[0116] It is understood that in order to achieve the connection between the clamping portions 421 at both ends of the cover plate 4 and the clamping fitting portions 31 on the two movable brackets 3, two sets of assemblies formed by the handle 41, the clamping block 42, and the first elastic member 43 are provided. The two sets of assemblies are symmetrically arranged so that the operator can simultaneously grasp the two handles 41 to drive the two clamping blocks 42 to move synchronously, thereby achieving the simultaneous connection or separation between the clamping portions 421 at both ends of the cover plate 4 and the clamping fitting portions 31 on the two movable brackets 3. This structure is simple and easy to operate.

[0117] Furthermore, to facilitate securing the protective cover 10 to the cover 4, in some embodiments, the cover 4 includes an air tube and a suction nozzle connected thereto. The air tube is connected to the negative pressure system, and the suction nozzle is used to suction and secure the protective cover 10 under the action of negative pressure. In other words, this embodiment utilizes the negative pressure system to generate negative pressure suction at the suction nozzle through the air tube, thereby securing the protective cover 10. This simple structure facilitates securing the protective cover 10 and prevents damage to the protective cover 10. When the protective cover 10 needs to be released, the negative pressure system is simply turned off.

[0118] In addition, in order to facilitate the floating connection of the movable bracket 3 to the rack 1, please continue to refer to Figure 2 In some embodiments, the assembly device further includes a slide rail 11 arranged vertically and a slider 32 that slides with the slide rail 11; one of the slide rail 11 and the slider 32 is set on the frame 1, and the other is set on the movable bracket 3.

[0119] In other words, in this embodiment, the movable bracket 3 is connected to the frame 1 through the sliding engagement of the slider 32 and the slide rail 11, allowing the movable bracket 3 to move vertically relative to the frame 1. When the movable bracket 3 is driven to move by the first cam 7, the slider 32 moves along the slide rail 11, thereby ensuring the stability of the movement of the movable bracket 3 and the correctness of its movement direction.

[0120] One application scenario of the present embodiment is that after the initial processing of a workpiece 20, a portion or part thereof needs to be protected from subsequent processing. Therefore, the present assembly device can be used to install the protective cover 10 on the workpiece 20 to protect the portion that does not need to be processed. It is anticipated that the assembly device provided by the present embodiment can also be applied to other similar scenarios.

[0121] It should also be noted that, in this specification, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0122] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0123] The above is a detailed introduction to the assembly device provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An assembly device for mounting a protective cover (10) including a buckle (101) on a workpiece (20), characterized in that: include: Rack (1); A carrying plate (2), connected to the frame (1), and used for carrying the workpiece (20); A movable bracket (3) is floatingly connected to the frame (1) and includes a resisting portion (33); a cover plate (4) detachably connected to the movable bracket (3) and used for fixing the protective cover (10) arranged with the buckle (101) toward the carrier plate (2), the cover plate (4) being arranged above the carrier plate (2), and the protective cover (10) being arranged above the workpiece (20); A buckle-type expansion assembly (5) comprises a vertical moving block (51) and a horizontal moving block (52) that engages with the inclined surface of the vertical moving block (51); A rotating shaft (6), a first cam (7) and a second cam (8), wherein the rotating shaft (6) is rotatably connected to the frame (1) and is arranged below the supporting plate (2), and the first cam (7) and the second cam (8) are sleeved on the rotating shaft (6); The lower end of the vertical moving block (51) abuts against the peripheral wall of the first cam (7), so that the first cam (7) drives the horizontal moving block (52) to move horizontally to open the buckle (101); the peripheral wall of the second cam (8) abuts against the abutting portion (33), so that the movable bracket (3) is driven by the second cam (8) to move, thereby driving the protective cover (10) to approach the workpiece (20), so that the buckle (101) after being opened passes over the lower edge of the workpiece (20), so that after the buckle opening assembly (5) is reset and the buckle (101) is released, the buckle (101) clamps the lower edge of the workpiece (20).

2. The assembly device according to claim 1, wherein: There is a phase difference between the protruding sections of the peripheral walls of the first cam (7) and the second cam (8), so that when the rotating shaft (6) rotates, there is a timing difference between the action of opening the buckle (101) and the action of moving the protective sleeve (10) close to the workpiece (20).

3. The assembly device according to claim 2, wherein: The first cam (7) is configured such that, in the direction opposite to the rotation direction of the rotating shaft (6), the peripheral wall between 0° and N1° is a first protruding section (71), and the peripheral wall between N1° and 360° is a first regular section (72); 0° of the peripheral wall of the first cam (7) is a reference angle based on the starting point of the first protruding section (71); The second cam (8) is configured such that, in the direction opposite to the rotation direction of the rotating shaft (6), the peripheral wall between 0° and N2° is the second regular section (82), and the peripheral wall between N2° and 360° is the second protruding section (81); 0° of the peripheral wall of the second cam (8) is a reference angle based on the starting point of the second regular section (82); In the initial state, the 0° position of the peripheral wall of the first cam (7) contacts the lower end of the vertical moving block (51); the 0° position of the peripheral wall of the second cam (8) contacts the abutment portion (33); 0<N2<N1<360.

4. The assembly device according to claim 3, characterized in that: The first protruding section (71) includes: a first rising protruding section between 0° and N2°, a first constant height protruding section between N2° and N3°, and a first falling protruding section between N3° and N1°; The second protruding section (81) includes: a second ascending protruding section between N2° and N3°, a second constant height protruding section between N3° and N1°, and a second descending protruding section between N1° and 360°; Among them, N2<N3<N1.

5. The assembly device according to claim 4, characterized in that: N1 is 270, N2 is 90, and N3 is 180.

6. The assembly device according to any one of claims 1 to 5, characterized in that: The assembly device comprises two frames (1) and two movable brackets (3). The two frames (1) are respectively connected to two ends of the bearing plate (2); The two movable brackets (3) are respectively arranged at both ends of the bearing plate (2) and are respectively connected to the two frames (1) in a floating manner; The cover plate (4) has a clamping portion (421) at both ends, and the two movable brackets (3) respectively have a clamping matching portion (31) adapted to the clamping portion (421).

7. The assembly device according to claim 6, characterized in that: The cover plate (4) is provided with: A handle (41) movable laterally; A clamping block (42) is movable laterally, connected to the handle (41), and is provided with the clamping portion (421); The first elastic member (43) is arranged on the cover plate (4) in a transverse direction and contacts the clamping block (42), and is used to provide elastic tension for the clamping block (42).

8. The assembly device according to claim 6, characterized in that: Also includes: A slide rail (11) arranged vertically and a slider (32) slidingly engaged with the slide rail (11); One of the slide rail (11) and the slider (32) is arranged on the frame (1), and the other is arranged on the movable bracket (3).

9. The assembly device according to claim 6, characterized in that: The resistance portion (33) is configured as an upward resistance surface (331); The movable bracket (3) is suitable for moving downward under the interference of the second cam (8); It also includes a second elastic member (34), which is arranged between the movable bracket (3) and the frame (1) and is used to provide an upward elastic force to the movable bracket (3).

10. The assembly device according to any one of claims 1 to 5, characterized in that: The cover plate (4) comprises an air pipe and a suction nozzle connected thereto, the air pipe being used to be connected to a negative pressure system, and the suction nozzle being used to adsorb and fix the protective cover (10) under the action of negative pressure.

11. The assembly device according to any one of claims 1 to 5, characterized in that: Also includes: a third elastic member (53) and / or a fourth elastic member (54); The third elastic member (53) is arranged between the bearing plate (2) and the vertical moving block (51), and is used to provide a downward elastic force to the vertical moving block (51); The fourth elastic member (54) is arranged between the frame (1) and the transverse moving block (52), and is used to provide an elastic force opposite to the expansion direction to the transverse moving block (52).

12. The assembly device according to any one of claims 1 to 5, characterized in that: Also includes: A rotating handle (9) connected to the rotating shaft (6); A pin hole (91), and an elastic pin (12) suitable for being inserted into the pin hole (91), wherein one of the elastic pin (12) and the pin hole (91) is arranged on the rotating handle (9), and the other is arranged on the frame (1); a surface of the elastic pin (12) facing the rotating direction of the rotating handle (9) includes a third inclined surface (121) or an arc surface, and a surface facing away from the rotating direction of the rotating handle (9) includes a flat surface (122); The elastic pin (12) retracts when the third inclined surface (121) or the arc surface is in contact with the wall of the pin hole (91) to allow the rotating handle (9) to rotate; and the elastic pin (12) limits the rotation of the rotating handle (9) when the plane (122) is in contact with the wall of the pin hole (91).

13. The assembly device according to claim 12, characterized in that: Also includes: A limiting groove (92) and an elastic limiting member (13); One of the limiting groove (92) and the elastic limiting member (13) is provided on the rotating handle (9), and the other is provided on the frame (1); When the action of opening the buckle (101) and the action of the protective cover (10) approaching the workpiece (20) are completed, the elastic limiting member (13) springs into the limiting groove (92); When the action of opening the buckle (101) and the action of the protective cover (10) approaching the workpiece (20) begin, the elastic limiting member (13) disengages from the limiting groove (92).

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